Venson



(No Model.)

* WgHfH. STEVENSON 8v J. SOLTER.-

GUT'IINGrA AND PUlIG'HINGr PRESS. No. 244,945. Patented July 26,1881..

wwe/ZZ 0719.'

V/ Qwssea i' wam ff H, zwem -flffaf A@ UNITED STATES PATENT OFFICE.

' WILLIAM H. H. s'rEvENsoN AND4 JOHN soLfrEE, 0E BALTIMORE, MARYLAND, 1AsgsIeNoEs To sTEvENsoN a PLU-NKETT, 0E sAME PLACE.

CUTTING AND Purim-imc PRESS.

Y SPECIFICATION forming part f Letters :Patent N0.\244,945, dated July26, 1881.

Application filed April 7, 1881. (No model.)

To all whom tt may concern Be it known that we, WILLIAM H. H. STE-VENSON and JOHN SOLTER, ot' Baltimore, and State of Maryland, haveinvented a new and useful Improvement in Guttinga'nd Punchin g Presses;and we do hereby declare that the following is a l'ull, clear, and exactdescription of the same.

Our invention is an improvement upon machines for cutting, pressing,drawing, or punching metal plate'of that class .in which thereciprocating head is operated by a lever, and is connected generally toa treadle.

The principal object of our invention is to secure adj ustability in thesliding head or plunger which carries the upper die or punch.

It also has for its object to furnish inexpensive and convenientlyoperating adjustable connections and stops for the operating-levers Vbywhich the sliding head is moved. Y

In the drawings, Figure l shows a side elevation of the press. Fig. 2shows a front view of the adjustable plunger detached.

rIn these drawings, Fig. 1 shows an ordinary form of machine in itsgeneral construction, which general construction, therefore, need not beparticularly described.

The first part of our invention relates particularly to the constructionof the plunger A, which carries the upper die or punch. Heretofore thishead or plunger hasbeen made of one piece, and could be moved toward thelower or iixed die only by means of the lever by which it was operated.This improved part of the machine is shown more clearly in Fig. 2. Inthis ligure the main body of the plunger is represented at A. It may becast in one piece, and externally is of the ordinary shape, beingprovided with flanges, preferably of V shape in crosssection, by meansof which it is accurately held in guides which permit free verticalmovement. This plunger is chambered, as shown at a a, the chamberextending from front to rear. Within this chamber is fitted a yoke, B,fitting accurately, but loosely, at the sides, but made shorter than thechamber of the plunger in which it is placed. The yoke B is recessedalso fromfront torear, as shown in Fig. 2 in full lines b b, and indotted lines c c in Fig. 1. This recessreceives theend of the lever C,

with or without its friction-'wheel d. The wheel d is pivoted betweentwo prongs, e e, of the lever C, and bears against the inner surface'ofthe block above and below, being iitted accurately thereto. The prongedend of the lever, 55 as shown in dotted lines in Fig. l, is reduced indepth, so as to be less than the vertical measurement 0I" the recess intheA yoke, in or der to prevent the lever from binding against the topand bottom of the recess in its move- 6o ment.

Fixed to the sliding yoke B are two rods, f g. The rod fis iixedin theupper end of the yoke, and extends through a sleeve, h, in the uppercross-bar of the plunger, through which it slides freely. It isthreaded, and is provided with nuts it', which, when turned to bearagainst the ends of the sleeve h, hold the yoke B in any requiredposition within the plunger, or the position of the yoke may be shiftedat pleas- 7o u re, within the limits of the chamber of the plunger, bymovement ot' the nuts i i. The rod g is iixed in the lower part ot' theyoke B and passes through a hole in the lower part of the plunger,serving simply as a guide for the yoke and may be dispensed with.

It will be understood that the plunger A may receive any suitable die,such as are ordin-arily used on this class of machines, and when ever,for any reason, it be desired to raise the plunger or to lower it, inorder to increase or diminish the space between the lower limit of itsmotion and the lower die or bed-plate, it canbe readily accomplished byturning the nuts i t'.

In machines of this class, in which the lever directly operating theplunger is moved by a treadle-lever, such as that shown at l), it isnecessary to have an adjustable stop with a leather or rubber bumper forthe treadledever, and adjustable connection between suchv treadle-leverand the lever directly operating the plunger, in order that the movementof the upper die may be accurately determined. We have provided specialdevices for this purpose, as shown in Fig. 1. The adjustable stop comsists of a piece, E, formed substantially of T shape, as shown in theligure. It is attached to the lever by vmeans of the pivotal bolt whichpasses through its longer arm l, while the up- Ico per arm, k, restsagainst the flange of the leg. A horizontal arm, m, extends directlyover the treadle-lever D, and is provided with a rod, n, which passesfreely through a vertical hole in the said horizontal arm. The rod uisthreaded, and is held in any position by nuts o o, and is providedwith a head,p, with a leather or rubber bumper, which bears directlyagainst the treadle-lever and limits its upward movement. Connectionbetween the levers C and D is formed by a bar, F G, the two parts ofwhich F G are provided with right and left hand screws q r, which workin nuts s s xed upon a hollow sleeve, t. The sleeve t is provided with ahand-wheehfu, and by turning this handwheel the connecting-bar F G maybe readily lengthened or shortened.

XVe are aware that adjustable connectingrods are commonly used forvarious purposes, as well as adjustable stops, and upon these points wedesire to have it understood that we limit our claims to the precisedevices shown.

Having thus described our invention, what we claim is l. In a metalpress, the combination of the z5 sliding head A, carrying a die, theoperatinglever C, and the block B, adjustable within said sliding headA, substantially as described.

2. The combination, with a reciprocating slotted head, A, carrying adie, and with the lever C, of the yoke B, having the screw-rod f and theadjusting-nuts h i, as described.

The adjustable stop E, in combination with the rod n, nuts 0 o, andireadle-lever D, substantially as described.

4. The combination ot' the reciprocatinghead A, the adjustable yoke B,the operating-lever C, and the friction-roller d, as described.

In testimony whereof we have signed our names to this specification inthe presence of 4o two subscribing witnesses.

WILLIAM H. H. STEVENSON. JOHN SOLTER.

Witnesses:

JNO. T. MADDOX, D. H. MEAD.

